//获得coolie 的值

function cookie(name) {
	var cookieArray = document.cookie.split("; "); // 得到分割的cookie名值对
	var cookie = new Object();
	for (var i = 0; i < cookieArray.length; i++) {
		var arr = cookieArray[i].split("="); // 将名和值分开
		if (arr[0] == name)
			return unescape(arr[1]); // 如果是指定的cookie，则返回它的值
	}
	return "";
}
function delCookie(name)// 删除cookie
{
	document.cookie = name + "=;expires=" + (new Date(0)).toGMTString();
}
function getCookie(objName) {// 获取指定名称的cookie的值
	var arrStr = document.cookie.split("; ");
	for (var i = 0; i < arrStr.length; i++) {
		var temp = arrStr[i].split("=");
		if (temp[0] == objName)
			return unescape(temp[1]);
	}
}
function addCookie(objName, objValue, objHours) { // 添加cookie
	var str = objName + "=" + escape(objValue);
	if (objHours > 0) { // 为时不设定过期时间，浏览器关闭时cookie自动消失
		var date = new Date();
		var ms = objHours * 3600 * 1000;
		date.setTime(date.getTime() + ms);
		str += "; expires=" + date.toGMTString();
	}
	document.cookie = str;
}
function SetCookie(name, value)// 两个参数，一个是cookie的名子，一个是值
{
	var Days = 30; // 此 cookie 将被保存 30 天
	var exp = new Date(); // new Date("December 31, 9998");
	exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
	document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)// 取cookies函数
{
	var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
	if (arr != null)
		return unescape(arr[2]);
	return null;
}
function delCookie(name)// 删除cookie
{
	var exp = new Date();
	exp.setTime(exp.getTime() - 1);
	var cval = getCookie(name);
	if (cval != null)
		document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
}